Industrial emergency and exit lighting under AS/NZS 2293

A warehouse at 2 a.m. with the high-bays off is not a hotel corridor. The travel distances are longer, the floor is a moving plant, and the person leaving may be a contractor who has never walked the secondary exit. Yet a surprising number of industrial specifications still treat emergency lighting as a handful of batten packs copied from a commercial tenancy schedule.

This essay is a working method for emergency and exit lighting on Australian industrial sites. It sits beside the dedicated AS/NZS 2293 testing and logbooks note and in the industrial and warehouse hub. The standards hub is where the paper has to live after the fire brigade asks for it.

What 2293 is asking for on a real site

AS/NZS 2293 is the Australian and New Zealand family for emergency lighting and exit signs. It tells you how to light an escape path, how to mark the way out, how the equipment should behave, and how you prove it later. It is not a wiring rule — that is AS/NZS 3000 — and it is not a substitute for the National Construction Code or a fire-engineering report. Those documents decide where people go. 2293 is how you make that route visible when the site has gone dark.

The standard talks in illuminance on the path, duration, viewing of legends, and a maintenance regime. Typical briefing language, used here as a conversation starter rather than a substitute for the current edition:

• Escape routes need a maintained minimum on the floor along the defined path, including at changes of direction and at each exit door.
• Open areas above a stated size need open-area lighting so people can reach a route.
• High-risk task areas — pits, plant with stored energy — may need a higher emergency illuminance so a process can be made safe.
• Exit signs need to be seen and still there when the racking and the pallet wrap have moved.

Always open the current part and the building’s fire-engineering brief. A shed with a travel distance that only works because of an alternative solution is not a warehouse you can light from memory.

Generators are not a magic clause

Industrial sites love generators. They keep cold rooms cold and they keep a process from ruining a batch. That is a production decision. It becomes an emergency-lighting decision only if you design it as a safety service: a defined circuit, an automatic changeover that is tested, and fuel that is actually there at 3 a.m.

Most of the generators I meet in Melbourne’s west do none of that on paper. They are on a “keep the plant alive” board. Write the strategy in one sentence that a fire officer can read:

• Self-contained packs with a stated duration; or
• A central battery or inverter with a stated circuit list; or
• A generator-backed safety service that meets the Standard and the NCC, with testing to match.

If you cannot write that sentence, you do not have a strategy. You have a hope. Pair it with the high-bay selection so nobody “solves” escape lighting by leaving the high-bays on a generator and skipping the path lighting. Cheap LED emergency gear can also flicker or refuse to start on a dirty standby waveform. Specify compatibility, then test on the actual set.

Cold, dust, height and the pack that cannot be reached

Emergency equipment is specified in offices as if the ambient were 22 °C and the ceiling were 2.7 m. Industrial sites are not that room.

Cold rooms and freezers punish batteries. A pack that passed a six-monthly test in the amenities corridor will not necessarily pass at −18 °C. Specify a rated ambient, or a remote battery in a warm space. Then test in the room. The cool-room essay is the hygiene half of this problem; this paragraph is the duration half.

Heat is the opposite Australian gift. A pack under a dark roof in January is an oven. Dust makes it worse. Write IP for the environment and a cleaning cycle. Height is a maintenance decision. A self-contained pack at 14 m is a boom lift and a forgotten defect. Prefer accessible locations along the escape path, or a central system you can test from a board. Exit signs get hit: specify IK and mounting that a reach truck will not treat as a target.

Exit signs in a hall that keeps changing

Warehouses rearrange. The pictogram that was visible on day one is now behind a wrap machine. 2293 and the NCC want a sign that can be seen along the route people will actually use, including the secondary exit the night cleaner is sent to.

Use the current pictogram the building surveyor will accept. In a dusty hall, treat the legend as an optic: luminance, contrast, and a viewing distance that survives a dirty cover. Photoluminescent signs need a charging light that is actually on and a fire-engineering brief that allows them.

Testing, logbooks and the contractor who “did it last year”

The testing regime is the part industrial sites skip because the hall is busy. Discharge tests, function tests, and a logbook that records defects and their close-out are the job. A spreadsheet last updated when the shed opened is not a logbook.

Read the testing and logbooks essay for the procedure. The industrial overlay is access and isolation:

• You cannot test a freezer pack from the tea room.
• You cannot isolate a production hall on a Thursday afternoon without a written window.
• You cannot claim a test when half the fittings were at 14 m and the boom was “coming next month”.
• You cannot ignore fittings that sit on a generator circuit and were never on the self-contained schedule.

Automatic test systems help when someone reads the report. They do not help when the email goes to a contractor who finished last June. Name the person who owns the logbook. A PCBU who cannot produce it is the same PCBU who will be asked about workshop lighting and WHS duties after the next incident. Put emergency fittings on the same audit and relamping round as the high-bays, with their own pass/fail.

What to write in the specification

Steal this structure and then edit it for the site:

1. Name the NCC classification, the fire-engineering brief, and the AS/NZS 2293 edition.
2. Name the escape strategy in one sentence: packs, central battery, or generator-backed safety service.
3. Name each path, open area and high-risk task, with the maintained emergency illuminance and duration.
4. Name ambient conditions — cold, heat, dust, washdown — and the IP, IK and battery chemistry that follow.
5. Name mounting heights and the access method for every test.
6. Name exit-sign type, pictogram, viewing distance, and a rule that racking changes trigger a review.
7. Name the test system, the logbook owner, and the defect close-out time.
8. Name spare heads, compatible batteries available in Australia, and the measurement protocol at completion.

Require a night-time walk with the normal lighting isolated, racking in place, and the generator (if it is part of the story) actually running. A daytime walk with the high-bays on is a tour, not a test.

How we commission a shed

On a recent 12,000 square metre Victorian distribution centre we refused to hang emergency packs on every high-bay. Escape paths sat on accessible low-level luminaires with a central inverter. The generator kept the cool rooms; it was documented as not the 2293 strategy. The logbook started on the day of the first discharge test. That brief survived the first fire-brigade visit.

The mistakes we keep seeing

“Generator on site” written as if it were 2293. Packs at 14 m with no access. Exit signs aimed at the slab. A corridor test used to bless a freezer. Treating emergency lighting as a last-minute pack after the high-bay schedule is already approved. Forgetting that a night cleaner and a visiting driver are occupants too.

AS/NZS 2293 will not design the hall for you. It will stop you pretending a dark aisle with a glowing tea-room pack is a way out. Light the path people will actually use when the plant has stopped, then keep the logbook as if someone will ask to see it — because they will.